List, I'm having a minor problem on one of our 'D's with hammers that sometime double strike a little on very soft blows. The key(s) are being played all the way down but the hammers don't go into check on that soft a blow. So some bounce back up enough to sometimes "bubble" very softly. It's happened before on another piano but I've always been able to change a little here, a little there, and manage to stop it. However, I've never really understood why it happens or what regulation adjustment would be *most* likely to stop it. Or is it a combination of things: like rep spring too strong, drop too little or too much? Dip? Something else? Comments? Thanks. Avery
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